Added Sensors class that abstracts away sensors from behaviors. Stops creatingduplicated sensors for each scout.
Fixes to WirelessReceiver and wl_test
Changed receive callback to use std::function so we can use std::bind topass non-static member functions. There is still a weird problem whereWirelessReceiver::dummy gets called many times for each incoming packetin wl_test.
Adding wl_test files that were not added before